Abstract
The triangle refractive index profile of LEAF fiber (a non-zero dispersion
shifted fiber) makes it much more sensitive to temperature and strain. Owing to its high
stimulated Brillouin scattering (SBS) threshold for long distance distributed sensors,
we studied the Brillouin spectrum characteristics of LEAF under different strain and
temperature conditions. The results are compared with those of SMF-28. Based on the
linear relationship between the four peaks' linewidth/peak frequency and
strain/temperature, we achieved a strain error of 37 με and a temperature
error of 1.8°C with a spatial resolution of 4 m for simultaneous temperature
and strain measurement.
© 2011 IEEE
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